Negative plate, preparation method of negative plate, and secondary battery

• Main Authors: WU BO, ZHU ZHONGSI, ZHENG YI, WANG LONG, ZHONG ZE
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a negative plate, a preparation method of the negative plate, and a secondary battery. The preparation method comprises the following steps: coating a current collector with a slurry containing a negative active material, a conducting agent and a binding agent, and carrying out baking to obtain an initial negative plate; uniformly mixing a polymerizable material, an additiveand a low-boiling-point solvent to prepare a coating solution, coating the surface of the initial negative plate with the coating solution, and carrying out drying to remove the low-boiling-point solvent and form a coating; and keeping the initial negative plate in air in a static state for some time, and further carrying out baking through heating to remove the additive from the coating and forma porous structure in the coating, so that the negative plate is prepared. The preparation method provided by the invention has the advantages that the cohesive force of the negative plate can be enhanced, expansion of the ne